JavaScript: what is it and what is it for?

JavaScript is one of the most popular and widely used programming languages in the world of web development. Introduced in 1995, this language is key to the creation of dynamic and interactive web pages, making it an indispensable element in today's digital environment.

In general terms, we can define JavaScript as a text-based programming language that is used both on the client side (frontend) and on the server side (backend). Its flexibility and versatility allow from the animation of graphics on a web page to the development of complete applications.

What is JavaScript used for?

JavaScript plays a central role in modern web development. Its ability to run directly in the web browser makes it an essential tool for creating rich user experiences. Here, we take a look at some of its most prominent uses:

1. Creating interactive web pages

JavaScript allows web pages to respond to user actions in real time, making the experience more fluid and dynamic. Common examples include: forms that validate data before submission, interactive drop-down menus, and image carousels that move automatically.

2. Full web application development

Frameworks and libraries such as React, Angular or Vue.js are based on JavaScript for the development of single-page applications (SPA). These applications load all their content dynamically, without the need to reload the entire page.

3. Backend development

With the introduction of environments such as Node.js, JavaScript has extended its reach to the backend. This means that developers can write both server-side and client-side code using the same language. 

4. Animations and graphics

JavaScript, along with tools such as Canvas and WebGL, is an excellent choice for developing complex animations, online games or even advanced data visualisations. 

5. Internet of Things (IoT)

JavaScriptis  alsoused in connected devices through platforms such as Johnny-Five or Node-RED, facilitating the programming of smart devices. 

5 advantages of JavaScript

JavaScript's success is no accident. Below, we explore some of its main advantages:

1. Runs directly in the browser

JavaScript is interpreted by modern web browsers, which eliminates the need to compile code before running it. This allows for quick testing and immediate results.

2. Unparalleled interactivity

JavaScript allows developers to transform static pages into interactive experiences. It is possible to respond to user events in real time, such as clicks or scrolling.

3. Cross-platform

JavaScript is platform independent, which means that any device with a browser can run it. This includes everything from computers to smartphones.

4. Extensive community and resources

JavaScript has one of the largest developer communities in the world. This translates into: extensive documentation and educational resources, multiple frameworks and libraries, and active forums to solve problems quickly. 

5. Versatility

JavaScript can be used both client-side and server-side, eliminating the need to learn multiple languages to develop complete applications.

4 limitations of JavaScript

Despite its many advantages, JavaScript is not without its limitations. Here are some of the most notable ones:

1. Security issues

Because JavaScript runs directly in the browser, it can be vulnerable to attacks such as cross-site scripting (XSS). Although tools exist to mitigate these risks, it is still a major concern.

2. Cross-browser compatibility

While modern browsers are fairly consistent in their support for JavaScript, minor differences can still arise, especially with more advanced or recent features.

3. Difficulty debugging errors

JavaScript is an interpreted language, which means that bugs often appear at runtime. Although debugging tools have improved considerably, it is still more complicated to debug compared to compiled languages.

4. Messy code

JavaScript's flexibility can be a double-edged sword. If a clear structure is not followed, code can become chaotic and difficult to maintain, especially in large projects. 

Become an all-round programmer: Degree in Full-Stack Development

Do you want to learn to program with JavaScript? UDIT's Bachelor's Degree in Full-Stack Development prepares you to acquire a deep understanding of all the technological layers behind any software development.

You will learn to master programming languages such as C++, C#, JavaScript or Python, development environments such as Visual Studio, Node.js or Django and software tools such as SQL Server, MongoDB, MATLAB or Maple, among others. 

Whatis Node.js and what is it used for?

At the end of the Degree you will get the most complete programmer profile in the market by combining knowledge of Back End and Front End development. 

During the first year of your degree, you'll build the foundations of programming, networking and mathematics, as well as knowledge of web design, interface design and user experience.

During the second year, you'll delve deeper into programming and algorithm design, and you'll train in Back End and Front End, applying your knowledge in project workshops.

In the third year, you will acquire extensive knowledge of cloud architectures and professional cloud services, as well as Artificial Intelligence. At the same time, you will come into contact with the industry by developing your professional internship in leading companies in the sector.

The last course will be the final step for your insertion in the labour market, learning about IoT (Internet of Things), cybersecurity, mobile application development and legal and ethical aspects of information technologies.

👇Whatbachelor's degree do you need to study Full-Stack Software Development?

If you decide to study the Bachelor's Degree in Full-Stack Development at UDIT you will be trained at the leading university in elevating to official university status degrees that did not exist in the Spanish educational landscape. This is the only 4-year degree that combines software development and front-end/back-end programming.

📃Do you havemore questions? Get them answered here.

Our learning by doingmethod  works, our students have won more than 300 awards, thanks to the UDIT methodology: innovative curricula that incorporate technology and innovation in the classroom and challenges and real projects that help them to acquire practical knowledge and build their portfolio.

You will learn at Madrid's newest technology campus, the International Campus of Technology, Innovation and Applied Sciences . Located on one of Madrid's main thoroughfares, Calle Alcalá, this campus of more than 7,000 m2 is a unique learning space with flexible, modular spaces that adapt to different needs and types of projects and spaces for networking between students, faculty and companies.

The building houses specialised laboratories equipped with state-of-the-art equipment for different areas of study, such as robotics, artificial intelligence, virtual reality, among others. On the top floor is the Proto Space: the most avant-garde laboratory of technology, science, innovation and materials in the capital that will allow you to practice the knowledge learnt in the subjects. In this space, of more than 1,000 m2, you will experiment with robotic arms, 3D printers, loT, among others.

https://www.youtube.com/watch?v=7u_cC4iAuoM

More information

Degree in Full-Stack Development

Which bachelor's degree do you need to study Full-Stack Development?

Front End Developer, Back End Developer, Full-Stack Developer, know their differences